Commit | Line | Data |
---|---|---|
3f067dca | 1 | #include "callchain.h" |
b0a7d1a0 ACM |
2 | #include "debug.h" |
3 | #include "event.h" | |
3f067dca ACM |
4 | #include "evsel.h" |
5 | #include "hist.h" | |
9d2f8e22 ACM |
6 | #include "machine.h" |
7 | #include "map.h" | |
3f067dca | 8 | #include "sort.h" |
69d2591a | 9 | #include "strlist.h" |
9d2f8e22 | 10 | #include "thread.h" |
d027b640 | 11 | #include "vdso.h" |
9d2f8e22 | 12 | #include <stdbool.h> |
c506c96b | 13 | #include <symbol/kallsyms.h> |
3f067dca | 14 | #include "unwind.h" |
8b7bad58 | 15 | #include "linux/hash.h" |
9d2f8e22 | 16 | |
b91fc39f ACM |
17 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock); |
18 | ||
e167f995 ACM |
19 | static void dsos__init(struct dsos *dsos) |
20 | { | |
21 | INIT_LIST_HEAD(&dsos->head); | |
22 | dsos->root = RB_ROOT; | |
23 | } | |
24 | ||
69d2591a ACM |
25 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
26 | { | |
11246c70 | 27 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 28 | RB_CLEAR_NODE(&machine->rb_node); |
e167f995 ACM |
29 | dsos__init(&machine->user_dsos); |
30 | dsos__init(&machine->kernel_dsos); | |
69d2591a ACM |
31 | |
32 | machine->threads = RB_ROOT; | |
b91fc39f | 33 | pthread_rwlock_init(&machine->threads_lock, NULL); |
69d2591a ACM |
34 | INIT_LIST_HEAD(&machine->dead_threads); |
35 | machine->last_match = NULL; | |
36 | ||
d027b640 AH |
37 | machine->vdso_info = NULL; |
38 | ||
69d2591a ACM |
39 | machine->pid = pid; |
40 | ||
611a5ce8 | 41 | machine->symbol_filter = NULL; |
14bd6d20 | 42 | machine->id_hdr_size = 0; |
cfe1c414 | 43 | machine->comm_exec = false; |
fbe2af45 | 44 | machine->kernel_start = 0; |
611a5ce8 | 45 | |
69d2591a ACM |
46 | machine->root_dir = strdup(root_dir); |
47 | if (machine->root_dir == NULL) | |
48 | return -ENOMEM; | |
49 | ||
50 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 51 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 52 | pid); |
69d2591a ACM |
53 | char comm[64]; |
54 | ||
55 | if (thread == NULL) | |
56 | return -ENOMEM; | |
57 | ||
58 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 59 | thread__set_comm(thread, comm, 0); |
b91fc39f | 60 | thread__put(thread); |
69d2591a ACM |
61 | } |
62 | ||
b9d266ba AH |
63 | machine->current_tid = NULL; |
64 | ||
69d2591a ACM |
65 | return 0; |
66 | } | |
67 | ||
8fb598e5 DA |
68 | struct machine *machine__new_host(void) |
69 | { | |
70 | struct machine *machine = malloc(sizeof(*machine)); | |
71 | ||
72 | if (machine != NULL) { | |
73 | machine__init(machine, "", HOST_KERNEL_ID); | |
74 | ||
75 | if (machine__create_kernel_maps(machine) < 0) | |
76 | goto out_delete; | |
77 | } | |
78 | ||
79 | return machine; | |
80 | out_delete: | |
81 | free(machine); | |
82 | return NULL; | |
83 | } | |
84 | ||
8fa7d87f | 85 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
86 | { |
87 | struct dso *pos, *n; | |
88 | ||
8fa7d87f | 89 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 90 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
91 | list_del(&pos->node); |
92 | dso__delete(pos); | |
93 | } | |
94 | } | |
95 | ||
3f067dca ACM |
96 | void machine__delete_threads(struct machine *machine) |
97 | { | |
b91fc39f | 98 | struct rb_node *nd; |
3f067dca | 99 | |
b91fc39f ACM |
100 | pthread_rwlock_wrlock(&machine->threads_lock); |
101 | nd = rb_first(&machine->threads); | |
3f067dca ACM |
102 | while (nd) { |
103 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
104 | ||
3f067dca | 105 | nd = rb_next(nd); |
b91fc39f | 106 | __machine__remove_thread(machine, t, false); |
3f067dca | 107 | } |
b91fc39f | 108 | pthread_rwlock_unlock(&machine->threads_lock); |
3f067dca ACM |
109 | } |
110 | ||
69d2591a ACM |
111 | void machine__exit(struct machine *machine) |
112 | { | |
113 | map_groups__exit(&machine->kmaps); | |
114 | dsos__delete(&machine->user_dsos); | |
115 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 116 | vdso__exit(machine); |
04662523 | 117 | zfree(&machine->root_dir); |
b9d266ba | 118 | zfree(&machine->current_tid); |
b91fc39f | 119 | pthread_rwlock_destroy(&machine->threads_lock); |
69d2591a ACM |
120 | } |
121 | ||
122 | void machine__delete(struct machine *machine) | |
123 | { | |
124 | machine__exit(machine); | |
125 | free(machine); | |
126 | } | |
127 | ||
876650e6 ACM |
128 | void machines__init(struct machines *machines) |
129 | { | |
130 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
131 | machines->guests = RB_ROOT; | |
611a5ce8 | 132 | machines->symbol_filter = NULL; |
876650e6 ACM |
133 | } |
134 | ||
135 | void machines__exit(struct machines *machines) | |
136 | { | |
137 | machine__exit(&machines->host); | |
138 | /* XXX exit guest */ | |
139 | } | |
140 | ||
141 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
142 | const char *root_dir) |
143 | { | |
876650e6 | 144 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
145 | struct rb_node *parent = NULL; |
146 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
147 | ||
148 | if (machine == NULL) | |
149 | return NULL; | |
150 | ||
151 | if (machine__init(machine, root_dir, pid) != 0) { | |
152 | free(machine); | |
153 | return NULL; | |
154 | } | |
155 | ||
611a5ce8 AH |
156 | machine->symbol_filter = machines->symbol_filter; |
157 | ||
69d2591a ACM |
158 | while (*p != NULL) { |
159 | parent = *p; | |
160 | pos = rb_entry(parent, struct machine, rb_node); | |
161 | if (pid < pos->pid) | |
162 | p = &(*p)->rb_left; | |
163 | else | |
164 | p = &(*p)->rb_right; | |
165 | } | |
166 | ||
167 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 168 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
169 | |
170 | return machine; | |
171 | } | |
172 | ||
611a5ce8 AH |
173 | void machines__set_symbol_filter(struct machines *machines, |
174 | symbol_filter_t symbol_filter) | |
175 | { | |
176 | struct rb_node *nd; | |
177 | ||
178 | machines->symbol_filter = symbol_filter; | |
179 | machines->host.symbol_filter = symbol_filter; | |
180 | ||
181 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
182 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
183 | ||
184 | machine->symbol_filter = symbol_filter; | |
185 | } | |
186 | } | |
187 | ||
cfe1c414 AH |
188 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
189 | { | |
190 | struct rb_node *nd; | |
191 | ||
192 | machines->host.comm_exec = comm_exec; | |
193 | ||
194 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
195 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
196 | ||
197 | machine->comm_exec = comm_exec; | |
198 | } | |
199 | } | |
200 | ||
876650e6 | 201 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 202 | { |
876650e6 | 203 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
204 | struct rb_node *parent = NULL; |
205 | struct machine *machine; | |
206 | struct machine *default_machine = NULL; | |
207 | ||
876650e6 ACM |
208 | if (pid == HOST_KERNEL_ID) |
209 | return &machines->host; | |
210 | ||
69d2591a ACM |
211 | while (*p != NULL) { |
212 | parent = *p; | |
213 | machine = rb_entry(parent, struct machine, rb_node); | |
214 | if (pid < machine->pid) | |
215 | p = &(*p)->rb_left; | |
216 | else if (pid > machine->pid) | |
217 | p = &(*p)->rb_right; | |
218 | else | |
219 | return machine; | |
220 | if (!machine->pid) | |
221 | default_machine = machine; | |
222 | } | |
223 | ||
224 | return default_machine; | |
225 | } | |
226 | ||
876650e6 | 227 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
228 | { |
229 | char path[PATH_MAX]; | |
230 | const char *root_dir = ""; | |
231 | struct machine *machine = machines__find(machines, pid); | |
232 | ||
233 | if (machine && (machine->pid == pid)) | |
234 | goto out; | |
235 | ||
236 | if ((pid != HOST_KERNEL_ID) && | |
237 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
238 | (symbol_conf.guestmount)) { | |
239 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
240 | if (access(path, R_OK)) { | |
241 | static struct strlist *seen; | |
242 | ||
243 | if (!seen) | |
244 | seen = strlist__new(true, NULL); | |
245 | ||
246 | if (!strlist__has_entry(seen, path)) { | |
247 | pr_err("Can't access file %s\n", path); | |
248 | strlist__add(seen, path); | |
249 | } | |
250 | machine = NULL; | |
251 | goto out; | |
252 | } | |
253 | root_dir = path; | |
254 | } | |
255 | ||
256 | machine = machines__add(machines, pid, root_dir); | |
257 | out: | |
258 | return machine; | |
259 | } | |
260 | ||
876650e6 ACM |
261 | void machines__process_guests(struct machines *machines, |
262 | machine__process_t process, void *data) | |
69d2591a ACM |
263 | { |
264 | struct rb_node *nd; | |
265 | ||
876650e6 | 266 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
267 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
268 | process(pos, data); | |
269 | } | |
270 | } | |
271 | ||
272 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
273 | { | |
274 | if (machine__is_host(machine)) | |
275 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
276 | else if (machine__is_default_guest(machine)) | |
277 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
278 | else { | |
279 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
280 | machine->pid); | |
281 | } | |
282 | ||
283 | return bf; | |
284 | } | |
285 | ||
876650e6 | 286 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
287 | { |
288 | struct rb_node *node; | |
289 | struct machine *machine; | |
290 | ||
876650e6 ACM |
291 | machines->host.id_hdr_size = id_hdr_size; |
292 | ||
293 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
294 | machine = rb_entry(node, struct machine, rb_node); |
295 | machine->id_hdr_size = id_hdr_size; | |
296 | } | |
297 | ||
298 | return; | |
299 | } | |
300 | ||
29ce3612 AH |
301 | static void machine__update_thread_pid(struct machine *machine, |
302 | struct thread *th, pid_t pid) | |
303 | { | |
304 | struct thread *leader; | |
305 | ||
306 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
307 | return; | |
308 | ||
309 | th->pid_ = pid; | |
310 | ||
311 | if (th->pid_ == th->tid) | |
312 | return; | |
313 | ||
b91fc39f | 314 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
315 | if (!leader) |
316 | goto out_err; | |
317 | ||
318 | if (!leader->mg) | |
11246c70 | 319 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
320 | |
321 | if (!leader->mg) | |
322 | goto out_err; | |
323 | ||
324 | if (th->mg == leader->mg) | |
325 | return; | |
326 | ||
327 | if (th->mg) { | |
328 | /* | |
329 | * Maps are created from MMAP events which provide the pid and | |
330 | * tid. Consequently there never should be any maps on a thread | |
331 | * with an unknown pid. Just print an error if there are. | |
332 | */ | |
333 | if (!map_groups__empty(th->mg)) | |
334 | pr_err("Discarding thread maps for %d:%d\n", | |
335 | th->pid_, th->tid); | |
8e160b2e | 336 | map_groups__put(th->mg); |
29ce3612 AH |
337 | } |
338 | ||
339 | th->mg = map_groups__get(leader->mg); | |
340 | ||
341 | return; | |
342 | ||
343 | out_err: | |
344 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
345 | } | |
346 | ||
b91fc39f ACM |
347 | static struct thread *____machine__findnew_thread(struct machine *machine, |
348 | pid_t pid, pid_t tid, | |
349 | bool create) | |
9d2f8e22 ACM |
350 | { |
351 | struct rb_node **p = &machine->threads.rb_node; | |
352 | struct rb_node *parent = NULL; | |
353 | struct thread *th; | |
354 | ||
355 | /* | |
38051234 | 356 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
357 | * so most of the time we dont have to look up |
358 | * the full rbtree: | |
359 | */ | |
29ce3612 | 360 | th = machine->last_match; |
f3b623b8 ACM |
361 | if (th != NULL) { |
362 | if (th->tid == tid) { | |
363 | machine__update_thread_pid(machine, th, pid); | |
364 | return th; | |
365 | } | |
366 | ||
0ceb8f6e | 367 | machine->last_match = NULL; |
99d725fc | 368 | } |
9d2f8e22 ACM |
369 | |
370 | while (*p != NULL) { | |
371 | parent = *p; | |
372 | th = rb_entry(parent, struct thread, rb_node); | |
373 | ||
38051234 | 374 | if (th->tid == tid) { |
0ceb8f6e | 375 | machine->last_match = th; |
29ce3612 | 376 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
377 | return th; |
378 | } | |
379 | ||
38051234 | 380 | if (tid < th->tid) |
9d2f8e22 ACM |
381 | p = &(*p)->rb_left; |
382 | else | |
383 | p = &(*p)->rb_right; | |
384 | } | |
385 | ||
386 | if (!create) | |
387 | return NULL; | |
388 | ||
99d725fc | 389 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
390 | if (th != NULL) { |
391 | rb_link_node(&th->rb_node, parent, p); | |
392 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
393 | |
394 | /* | |
395 | * We have to initialize map_groups separately | |
396 | * after rb tree is updated. | |
397 | * | |
398 | * The reason is that we call machine__findnew_thread | |
399 | * within thread__init_map_groups to find the thread | |
400 | * leader and that would screwed the rb tree. | |
401 | */ | |
418029b7 | 402 | if (thread__init_map_groups(th, machine)) { |
0170b14f | 403 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 404 | RB_CLEAR_NODE(&th->rb_node); |
418029b7 | 405 | thread__delete(th); |
cddcef60 | 406 | return NULL; |
418029b7 | 407 | } |
f3b623b8 ACM |
408 | /* |
409 | * It is now in the rbtree, get a ref | |
410 | */ | |
411 | thread__get(th); | |
0ceb8f6e | 412 | machine->last_match = th; |
9d2f8e22 ACM |
413 | } |
414 | ||
415 | return th; | |
416 | } | |
417 | ||
b91fc39f ACM |
418 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
419 | { | |
420 | return ____machine__findnew_thread(machine, pid, tid, true); | |
421 | } | |
422 | ||
314add6b AH |
423 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
424 | pid_t tid) | |
9d2f8e22 | 425 | { |
b91fc39f ACM |
426 | struct thread *th; |
427 | ||
428 | pthread_rwlock_wrlock(&machine->threads_lock); | |
429 | th = thread__get(__machine__findnew_thread(machine, pid, tid)); | |
430 | pthread_rwlock_unlock(&machine->threads_lock); | |
431 | return th; | |
9d2f8e22 ACM |
432 | } |
433 | ||
d75e6097 JO |
434 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
435 | pid_t tid) | |
9d2f8e22 | 436 | { |
b91fc39f ACM |
437 | struct thread *th; |
438 | pthread_rwlock_rdlock(&machine->threads_lock); | |
439 | th = thread__get(____machine__findnew_thread(machine, pid, tid, false)); | |
440 | pthread_rwlock_unlock(&machine->threads_lock); | |
441 | return th; | |
9d2f8e22 | 442 | } |
b0a7d1a0 | 443 | |
cfe1c414 AH |
444 | struct comm *machine__thread_exec_comm(struct machine *machine, |
445 | struct thread *thread) | |
446 | { | |
447 | if (machine->comm_exec) | |
448 | return thread__exec_comm(thread); | |
449 | else | |
450 | return thread__comm(thread); | |
451 | } | |
452 | ||
162f0bef FW |
453 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
454 | struct perf_sample *sample) | |
b0a7d1a0 | 455 | { |
314add6b AH |
456 | struct thread *thread = machine__findnew_thread(machine, |
457 | event->comm.pid, | |
458 | event->comm.tid); | |
65de51f9 | 459 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 460 | int err = 0; |
b0a7d1a0 | 461 | |
cfe1c414 AH |
462 | if (exec) |
463 | machine->comm_exec = true; | |
464 | ||
b0a7d1a0 ACM |
465 | if (dump_trace) |
466 | perf_event__fprintf_comm(event, stdout); | |
467 | ||
65de51f9 AH |
468 | if (thread == NULL || |
469 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 470 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 471 | err = -1; |
b0a7d1a0 ACM |
472 | } |
473 | ||
b91fc39f ACM |
474 | thread__put(thread); |
475 | ||
476 | return err; | |
b0a7d1a0 ACM |
477 | } |
478 | ||
479 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 480 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
481 | { |
482 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
483 | event->lost.id, event->lost.lost); | |
484 | return 0; | |
485 | } | |
486 | ||
ca33380a JO |
487 | static struct dso* |
488 | machine__module_dso(struct machine *machine, struct kmod_path *m, | |
489 | const char *filename) | |
da17ea33 JO |
490 | { |
491 | struct dso *dso; | |
da17ea33 | 492 | |
ca33380a | 493 | dso = dsos__find(&machine->kernel_dsos, m->name, true); |
da17ea33 | 494 | if (!dso) { |
ca33380a | 495 | dso = dsos__addnew(&machine->kernel_dsos, m->name); |
da17ea33 JO |
496 | if (dso == NULL) |
497 | return NULL; | |
498 | ||
499 | if (machine__is_host(machine)) | |
500 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
501 | else | |
502 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
503 | ||
504 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 505 | if (m->kmod && m->comp) |
da17ea33 | 506 | dso->symtab_type++; |
ca33380a JO |
507 | |
508 | dso__set_short_name(dso, strdup(m->name), true); | |
509 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
510 | } |
511 | ||
512 | return dso; | |
513 | } | |
514 | ||
4a96f7a0 AH |
515 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
516 | union perf_event *event) | |
517 | { | |
518 | if (dump_trace) | |
519 | perf_event__fprintf_aux(event, stdout); | |
520 | return 0; | |
521 | } | |
522 | ||
0ad21f68 AH |
523 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
524 | union perf_event *event) | |
525 | { | |
526 | if (dump_trace) | |
527 | perf_event__fprintf_itrace_start(event, stdout); | |
528 | return 0; | |
529 | } | |
530 | ||
3f067dca ACM |
531 | struct map *machine__new_module(struct machine *machine, u64 start, |
532 | const char *filename) | |
533 | { | |
ca33380a JO |
534 | struct map *map = NULL; |
535 | struct dso *dso; | |
536 | struct kmod_path m; | |
3f067dca | 537 | |
ca33380a | 538 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
539 | return NULL; |
540 | ||
bc84f464 JO |
541 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
542 | m.name); | |
543 | if (map) | |
544 | goto out; | |
545 | ||
ca33380a JO |
546 | dso = machine__module_dso(machine, &m, filename); |
547 | if (dso == NULL) | |
548 | goto out; | |
549 | ||
3f067dca ACM |
550 | map = map__new2(start, dso, MAP__FUNCTION); |
551 | if (map == NULL) | |
ca33380a | 552 | goto out; |
3f067dca | 553 | |
3f067dca | 554 | map_groups__insert(&machine->kmaps, map); |
ca33380a JO |
555 | |
556 | out: | |
557 | free(m.name); | |
3f067dca ACM |
558 | return map; |
559 | } | |
560 | ||
876650e6 | 561 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
562 | { |
563 | struct rb_node *nd; | |
8fa7d87f WL |
564 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
565 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 566 | |
876650e6 | 567 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 568 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
569 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
570 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
571 | } |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
8fa7d87f | 576 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
577 | bool (skip)(struct dso *dso, int parm), int parm) |
578 | { | |
8fa7d87f WL |
579 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
580 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
581 | } |
582 | ||
876650e6 | 583 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
584 | bool (skip)(struct dso *dso, int parm), int parm) |
585 | { | |
586 | struct rb_node *nd; | |
876650e6 | 587 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 588 | |
876650e6 | 589 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
590 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
591 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
592 | } | |
593 | return ret; | |
594 | } | |
595 | ||
596 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
597 | { | |
598 | int i; | |
599 | size_t printed = 0; | |
600 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
601 | ||
602 | if (kdso->has_build_id) { | |
603 | char filename[PATH_MAX]; | |
604 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
605 | printed += fprintf(fp, "[0] %s\n", filename); | |
606 | } | |
607 | ||
608 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
609 | printed += fprintf(fp, "[%d] %s\n", | |
610 | i + kdso->has_build_id, vmlinux_path[i]); | |
611 | ||
612 | return printed; | |
613 | } | |
614 | ||
615 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
616 | { | |
617 | size_t ret = 0; | |
618 | struct rb_node *nd; | |
619 | ||
b91fc39f ACM |
620 | pthread_rwlock_rdlock(&machine->threads_lock); |
621 | ||
3f067dca ACM |
622 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { |
623 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
624 | ||
625 | ret += thread__fprintf(pos, fp); | |
626 | } | |
627 | ||
b91fc39f ACM |
628 | pthread_rwlock_unlock(&machine->threads_lock); |
629 | ||
3f067dca ACM |
630 | return ret; |
631 | } | |
632 | ||
633 | static struct dso *machine__get_kernel(struct machine *machine) | |
634 | { | |
635 | const char *vmlinux_name = NULL; | |
636 | struct dso *kernel; | |
637 | ||
638 | if (machine__is_host(machine)) { | |
639 | vmlinux_name = symbol_conf.vmlinux_name; | |
640 | if (!vmlinux_name) | |
641 | vmlinux_name = "[kernel.kallsyms]"; | |
642 | ||
643 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
644 | "[kernel]", | |
645 | DSO_TYPE_KERNEL); | |
646 | } else { | |
647 | char bf[PATH_MAX]; | |
648 | ||
649 | if (machine__is_default_guest(machine)) | |
650 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
651 | if (!vmlinux_name) | |
652 | vmlinux_name = machine__mmap_name(machine, bf, | |
653 | sizeof(bf)); | |
654 | ||
655 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
656 | "[guest.kernel]", | |
657 | DSO_TYPE_GUEST_KERNEL); | |
658 | } | |
659 | ||
660 | if (kernel != NULL && (!kernel->has_build_id)) | |
661 | dso__read_running_kernel_build_id(kernel, machine); | |
662 | ||
663 | return kernel; | |
664 | } | |
665 | ||
666 | struct process_args { | |
667 | u64 start; | |
668 | }; | |
669 | ||
15a0a870 AH |
670 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
671 | size_t bufsz) | |
672 | { | |
673 | if (machine__is_default_guest(machine)) | |
674 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
675 | else | |
676 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
677 | } | |
678 | ||
a93f0e55 SQ |
679 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
680 | ||
681 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
682 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
683 | * symbol_name if it's not that important. | |
684 | */ | |
4b99375b AH |
685 | static u64 machine__get_running_kernel_start(struct machine *machine, |
686 | const char **symbol_name) | |
3f067dca | 687 | { |
15a0a870 | 688 | char filename[PATH_MAX]; |
a93f0e55 SQ |
689 | int i; |
690 | const char *name; | |
691 | u64 addr = 0; | |
3f067dca | 692 | |
15a0a870 | 693 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
694 | |
695 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
696 | return 0; | |
697 | ||
a93f0e55 SQ |
698 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
699 | addr = kallsyms__get_function_start(filename, name); | |
700 | if (addr) | |
701 | break; | |
702 | } | |
703 | ||
704 | if (symbol_name) | |
705 | *symbol_name = name; | |
3f067dca | 706 | |
a93f0e55 | 707 | return addr; |
3f067dca ACM |
708 | } |
709 | ||
710 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
711 | { | |
712 | enum map_type type; | |
4b99375b | 713 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
714 | |
715 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
716 | struct kmap *kmap; | |
717 | ||
718 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
719 | if (machine->vmlinux_maps[type] == NULL) | |
720 | return -1; | |
721 | ||
722 | machine->vmlinux_maps[type]->map_ip = | |
723 | machine->vmlinux_maps[type]->unmap_ip = | |
724 | identity__map_ip; | |
725 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
ba92732e WN |
726 | if (!kmap) |
727 | return -1; | |
728 | ||
3f067dca ACM |
729 | kmap->kmaps = &machine->kmaps; |
730 | map_groups__insert(&machine->kmaps, | |
731 | machine->vmlinux_maps[type]); | |
732 | } | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
737 | void machine__destroy_kernel_maps(struct machine *machine) | |
738 | { | |
739 | enum map_type type; | |
740 | ||
741 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
742 | struct kmap *kmap; | |
743 | ||
744 | if (machine->vmlinux_maps[type] == NULL) | |
745 | continue; | |
746 | ||
747 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
748 | map_groups__remove(&machine->kmaps, | |
749 | machine->vmlinux_maps[type]); | |
ba92732e | 750 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
751 | /* |
752 | * ref_reloc_sym is shared among all maps, so free just | |
753 | * on one of them. | |
754 | */ | |
755 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
756 | zfree((char **)&kmap->ref_reloc_sym->name); |
757 | zfree(&kmap->ref_reloc_sym); | |
758 | } else | |
759 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
760 | } |
761 | ||
762 | map__delete(machine->vmlinux_maps[type]); | |
763 | machine->vmlinux_maps[type] = NULL; | |
764 | } | |
765 | } | |
766 | ||
876650e6 | 767 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
768 | { |
769 | int ret = 0; | |
770 | struct dirent **namelist = NULL; | |
771 | int i, items = 0; | |
772 | char path[PATH_MAX]; | |
773 | pid_t pid; | |
774 | char *endp; | |
775 | ||
776 | if (symbol_conf.default_guest_vmlinux_name || | |
777 | symbol_conf.default_guest_modules || | |
778 | symbol_conf.default_guest_kallsyms) { | |
779 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
780 | } | |
781 | ||
782 | if (symbol_conf.guestmount) { | |
783 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
784 | if (items <= 0) | |
785 | return -ENOENT; | |
786 | for (i = 0; i < items; i++) { | |
787 | if (!isdigit(namelist[i]->d_name[0])) { | |
788 | /* Filter out . and .. */ | |
789 | continue; | |
790 | } | |
791 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
792 | if ((*endp != '\0') || | |
793 | (endp == namelist[i]->d_name) || | |
794 | (errno == ERANGE)) { | |
795 | pr_debug("invalid directory (%s). Skipping.\n", | |
796 | namelist[i]->d_name); | |
797 | continue; | |
798 | } | |
799 | sprintf(path, "%s/%s/proc/kallsyms", | |
800 | symbol_conf.guestmount, | |
801 | namelist[i]->d_name); | |
802 | ret = access(path, R_OK); | |
803 | if (ret) { | |
804 | pr_debug("Can't access file %s\n", path); | |
805 | goto failure; | |
806 | } | |
807 | machines__create_kernel_maps(machines, pid); | |
808 | } | |
809 | failure: | |
810 | free(namelist); | |
811 | } | |
812 | ||
813 | return ret; | |
814 | } | |
815 | ||
876650e6 | 816 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 817 | { |
876650e6 ACM |
818 | struct rb_node *next = rb_first(&machines->guests); |
819 | ||
820 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
821 | |
822 | while (next) { | |
823 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
824 | ||
825 | next = rb_next(&pos->rb_node); | |
876650e6 | 826 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
827 | machine__delete(pos); |
828 | } | |
829 | } | |
830 | ||
876650e6 | 831 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
832 | { |
833 | struct machine *machine = machines__findnew(machines, pid); | |
834 | ||
835 | if (machine == NULL) | |
836 | return -1; | |
837 | ||
838 | return machine__create_kernel_maps(machine); | |
839 | } | |
840 | ||
841 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
842 | enum map_type type, symbol_filter_t filter) | |
843 | { | |
844 | struct map *map = machine->vmlinux_maps[type]; | |
845 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
846 | ||
847 | if (ret > 0) { | |
848 | dso__set_loaded(map->dso, type); | |
849 | /* | |
850 | * Since /proc/kallsyms will have multiple sessions for the | |
851 | * kernel, with modules between them, fixup the end of all | |
852 | * sections. | |
853 | */ | |
854 | __map_groups__fixup_end(&machine->kmaps, type); | |
855 | } | |
856 | ||
857 | return ret; | |
858 | } | |
859 | ||
860 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
861 | symbol_filter_t filter) | |
862 | { | |
863 | struct map *map = machine->vmlinux_maps[type]; | |
864 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
865 | ||
39b12f78 | 866 | if (ret > 0) |
3f067dca | 867 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
868 | |
869 | return ret; | |
870 | } | |
871 | ||
872 | static void map_groups__fixup_end(struct map_groups *mg) | |
873 | { | |
874 | int i; | |
875 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
876 | __map_groups__fixup_end(mg, i); | |
877 | } | |
878 | ||
879 | static char *get_kernel_version(const char *root_dir) | |
880 | { | |
881 | char version[PATH_MAX]; | |
882 | FILE *file; | |
883 | char *name, *tmp; | |
884 | const char *prefix = "Linux version "; | |
885 | ||
886 | sprintf(version, "%s/proc/version", root_dir); | |
887 | file = fopen(version, "r"); | |
888 | if (!file) | |
889 | return NULL; | |
890 | ||
891 | version[0] = '\0'; | |
892 | tmp = fgets(version, sizeof(version), file); | |
893 | fclose(file); | |
894 | ||
895 | name = strstr(version, prefix); | |
896 | if (!name) | |
897 | return NULL; | |
898 | name += strlen(prefix); | |
899 | tmp = strchr(name, ' '); | |
900 | if (tmp) | |
901 | *tmp = '\0'; | |
902 | ||
903 | return strdup(name); | |
904 | } | |
905 | ||
bb58a8a4 JO |
906 | static bool is_kmod_dso(struct dso *dso) |
907 | { | |
908 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
909 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
910 | } | |
911 | ||
912 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
913 | struct kmod_path *m) | |
914 | { | |
915 | struct map *map; | |
916 | char *long_name; | |
917 | ||
918 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
919 | if (map == NULL) | |
920 | return 0; | |
921 | ||
922 | long_name = strdup(path); | |
923 | if (long_name == NULL) | |
924 | return -ENOMEM; | |
925 | ||
926 | dso__set_long_name(map->dso, long_name, true); | |
927 | dso__kernel_module_get_build_id(map->dso, ""); | |
928 | ||
929 | /* | |
930 | * Full name could reveal us kmod compression, so | |
931 | * we need to update the symtab_type if needed. | |
932 | */ | |
933 | if (m->comp && is_kmod_dso(map->dso)) | |
934 | map->dso->symtab_type++; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
3f067dca | 939 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 940 | const char *dir_name, int depth) |
3f067dca ACM |
941 | { |
942 | struct dirent *dent; | |
943 | DIR *dir = opendir(dir_name); | |
944 | int ret = 0; | |
945 | ||
946 | if (!dir) { | |
947 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
948 | return -1; | |
949 | } | |
950 | ||
951 | while ((dent = readdir(dir)) != NULL) { | |
952 | char path[PATH_MAX]; | |
953 | struct stat st; | |
954 | ||
955 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
956 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
957 | if (stat(path, &st)) | |
958 | continue; | |
959 | ||
960 | if (S_ISDIR(st.st_mode)) { | |
961 | if (!strcmp(dent->d_name, ".") || | |
962 | !strcmp(dent->d_name, "..")) | |
963 | continue; | |
964 | ||
61d4290c RY |
965 | /* Do not follow top-level source and build symlinks */ |
966 | if (depth == 0) { | |
967 | if (!strcmp(dent->d_name, "source") || | |
968 | !strcmp(dent->d_name, "build")) | |
969 | continue; | |
970 | } | |
971 | ||
972 | ret = map_groups__set_modules_path_dir(mg, path, | |
973 | depth + 1); | |
3f067dca ACM |
974 | if (ret < 0) |
975 | goto out; | |
976 | } else { | |
bb58a8a4 | 977 | struct kmod_path m; |
3f067dca | 978 | |
bb58a8a4 JO |
979 | ret = kmod_path__parse_name(&m, dent->d_name); |
980 | if (ret) | |
981 | goto out; | |
c00c48fc | 982 | |
bb58a8a4 JO |
983 | if (m.kmod) |
984 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 985 | |
bb58a8a4 | 986 | free(m.name); |
3f067dca | 987 | |
bb58a8a4 | 988 | if (ret) |
3f067dca | 989 | goto out; |
3f067dca ACM |
990 | } |
991 | } | |
992 | ||
993 | out: | |
994 | closedir(dir); | |
995 | return ret; | |
996 | } | |
997 | ||
998 | static int machine__set_modules_path(struct machine *machine) | |
999 | { | |
1000 | char *version; | |
1001 | char modules_path[PATH_MAX]; | |
1002 | ||
1003 | version = get_kernel_version(machine->root_dir); | |
1004 | if (!version) | |
1005 | return -1; | |
1006 | ||
61d4290c | 1007 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1008 | machine->root_dir, version); |
1009 | free(version); | |
1010 | ||
61d4290c | 1011 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
1012 | } |
1013 | ||
316d70d6 | 1014 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 1015 | { |
316d70d6 | 1016 | struct machine *machine = arg; |
3f067dca | 1017 | struct map *map; |
316d70d6 AH |
1018 | |
1019 | map = machine__new_module(machine, start, name); | |
1020 | if (map == NULL) | |
1021 | return -1; | |
1022 | ||
1023 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | static int machine__create_modules(struct machine *machine) | |
1029 | { | |
3f067dca ACM |
1030 | const char *modules; |
1031 | char path[PATH_MAX]; | |
1032 | ||
f4be904d | 1033 | if (machine__is_default_guest(machine)) { |
3f067dca | 1034 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1035 | } else { |
1036 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1037 | modules = path; |
1038 | } | |
1039 | ||
aa7fe3b0 | 1040 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1041 | return -1; |
1042 | ||
316d70d6 | 1043 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1044 | return -1; |
1045 | ||
316d70d6 AH |
1046 | if (!machine__set_modules_path(machine)) |
1047 | return 0; | |
3f067dca | 1048 | |
316d70d6 | 1049 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1050 | |
8f76fcd9 | 1051 | return 0; |
3f067dca ACM |
1052 | } |
1053 | ||
1054 | int machine__create_kernel_maps(struct machine *machine) | |
1055 | { | |
1056 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1057 | const char *name; |
4b99375b | 1058 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
1059 | if (!addr) |
1060 | return -1; | |
3f067dca ACM |
1061 | |
1062 | if (kernel == NULL || | |
1063 | __machine__create_kernel_maps(machine, kernel) < 0) | |
1064 | return -1; | |
1065 | ||
1066 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1067 | if (machine__is_host(machine)) | |
1068 | pr_debug("Problems creating module maps, " | |
1069 | "continuing anyway...\n"); | |
1070 | else | |
1071 | pr_debug("Problems creating module maps for guest %d, " | |
1072 | "continuing anyway...\n", machine->pid); | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Now that we have all the maps created, just set the ->end of them: | |
1077 | */ | |
1078 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1079 | |
1080 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1081 | addr)) { | |
1082 | machine__destroy_kernel_maps(machine); | |
1083 | return -1; | |
1084 | } | |
1085 | ||
3f067dca ACM |
1086 | return 0; |
1087 | } | |
1088 | ||
b0a7d1a0 ACM |
1089 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1090 | union perf_event *event) | |
1091 | { | |
4552cf0f NK |
1092 | int i; |
1093 | ||
1094 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1095 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1096 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1097 | event->mmap.len); | |
1098 | /* | |
1099 | * Be a bit paranoid here, some perf.data file came with | |
1100 | * a zero sized synthesized MMAP event for the kernel. | |
1101 | */ | |
1102 | if (machine->vmlinux_maps[i]->end == 0) | |
1103 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1104 | } | |
b0a7d1a0 ACM |
1105 | } |
1106 | ||
8e0cf965 AH |
1107 | static bool machine__uses_kcore(struct machine *machine) |
1108 | { | |
1109 | struct dso *dso; | |
1110 | ||
8fa7d87f | 1111 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1112 | if (dso__is_kcore(dso)) |
1113 | return true; | |
1114 | } | |
1115 | ||
1116 | return false; | |
1117 | } | |
1118 | ||
b0a7d1a0 ACM |
1119 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1120 | union perf_event *event) | |
1121 | { | |
1122 | struct map *map; | |
1123 | char kmmap_prefix[PATH_MAX]; | |
1124 | enum dso_kernel_type kernel_type; | |
1125 | bool is_kernel_mmap; | |
1126 | ||
8e0cf965 AH |
1127 | /* If we have maps from kcore then we do not need or want any others */ |
1128 | if (machine__uses_kcore(machine)) | |
1129 | return 0; | |
1130 | ||
b0a7d1a0 ACM |
1131 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1132 | if (machine__is_host(machine)) | |
1133 | kernel_type = DSO_TYPE_KERNEL; | |
1134 | else | |
1135 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1136 | ||
1137 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1138 | kmmap_prefix, | |
1139 | strlen(kmmap_prefix) - 1) == 0; | |
1140 | if (event->mmap.filename[0] == '/' || | |
1141 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
b0a7d1a0 ACM |
1142 | map = machine__new_module(machine, event->mmap.start, |
1143 | event->mmap.filename); | |
1144 | if (map == NULL) | |
1145 | goto out_problem; | |
1146 | ||
b0a7d1a0 ACM |
1147 | map->end = map->start + event->mmap.len; |
1148 | } else if (is_kernel_mmap) { | |
1149 | const char *symbol_name = (event->mmap.filename + | |
1150 | strlen(kmmap_prefix)); | |
1151 | /* | |
1152 | * Should be there already, from the build-id table in | |
1153 | * the header. | |
1154 | */ | |
b837a8bd NK |
1155 | struct dso *kernel = NULL; |
1156 | struct dso *dso; | |
1157 | ||
1158 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { | |
e746b3ea | 1159 | if (is_kernel_module(dso->long_name)) |
b837a8bd NK |
1160 | continue; |
1161 | ||
1162 | kernel = dso; | |
1163 | break; | |
1164 | } | |
1165 | ||
1166 | if (kernel == NULL) | |
1167 | kernel = __dsos__findnew(&machine->kernel_dsos, | |
1168 | kmmap_prefix); | |
b0a7d1a0 ACM |
1169 | if (kernel == NULL) |
1170 | goto out_problem; | |
1171 | ||
1172 | kernel->kernel = kernel_type; | |
1173 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1174 | goto out_problem; | |
1175 | ||
330dfa22 NK |
1176 | if (strstr(kernel->long_name, "vmlinux")) |
1177 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1178 | |
b0a7d1a0 ACM |
1179 | machine__set_kernel_mmap_len(machine, event); |
1180 | ||
1181 | /* | |
1182 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1183 | * symbol. Effectively having zero here means that at record | |
1184 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1185 | */ | |
1186 | if (event->mmap.pgoff != 0) { | |
1187 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1188 | symbol_name, | |
1189 | event->mmap.pgoff); | |
1190 | } | |
1191 | ||
1192 | if (machine__is_default_guest(machine)) { | |
1193 | /* | |
1194 | * preload dso of guest kernel and modules | |
1195 | */ | |
1196 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1197 | NULL); | |
1198 | } | |
1199 | } | |
1200 | return 0; | |
1201 | out_problem: | |
1202 | return -1; | |
1203 | } | |
1204 | ||
5c5e854b | 1205 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1206 | union perf_event *event, |
1207 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1208 | { |
1209 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1210 | struct thread *thread; | |
1211 | struct map *map; | |
1212 | enum map_type type; | |
1213 | int ret = 0; | |
1214 | ||
1215 | if (dump_trace) | |
1216 | perf_event__fprintf_mmap2(event, stdout); | |
1217 | ||
1218 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1219 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1220 | ret = machine__process_kernel_mmap_event(machine, event); | |
1221 | if (ret < 0) | |
1222 | goto out_problem; | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1227 | event->mmap2.tid); |
5c5e854b SE |
1228 | if (thread == NULL) |
1229 | goto out_problem; | |
1230 | ||
1231 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1232 | type = MAP__VARIABLE; | |
1233 | else | |
1234 | type = MAP__FUNCTION; | |
1235 | ||
2a03068c | 1236 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1237 | event->mmap2.len, event->mmap2.pgoff, |
1238 | event->mmap2.pid, event->mmap2.maj, | |
1239 | event->mmap2.min, event->mmap2.ino, | |
1240 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1241 | event->mmap2.prot, |
1242 | event->mmap2.flags, | |
5835edda | 1243 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1244 | |
1245 | if (map == NULL) | |
b91fc39f | 1246 | goto out_problem_map; |
5c5e854b SE |
1247 | |
1248 | thread__insert_map(thread, map); | |
b91fc39f | 1249 | thread__put(thread); |
5c5e854b SE |
1250 | return 0; |
1251 | ||
b91fc39f ACM |
1252 | out_problem_map: |
1253 | thread__put(thread); | |
5c5e854b SE |
1254 | out_problem: |
1255 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
162f0bef FW |
1259 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1260 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1261 | { |
1262 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1263 | struct thread *thread; | |
1264 | struct map *map; | |
bad40917 | 1265 | enum map_type type; |
b0a7d1a0 ACM |
1266 | int ret = 0; |
1267 | ||
1268 | if (dump_trace) | |
1269 | perf_event__fprintf_mmap(event, stdout); | |
1270 | ||
1271 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1272 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1273 | ret = machine__process_kernel_mmap_event(machine, event); | |
1274 | if (ret < 0) | |
1275 | goto out_problem; | |
1276 | return 0; | |
1277 | } | |
1278 | ||
314add6b | 1279 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1280 | event->mmap.tid); |
b0a7d1a0 ACM |
1281 | if (thread == NULL) |
1282 | goto out_problem; | |
bad40917 SE |
1283 | |
1284 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1285 | type = MAP__VARIABLE; | |
1286 | else | |
1287 | type = MAP__FUNCTION; | |
1288 | ||
2a03068c | 1289 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1290 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1291 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1292 | event->mmap.filename, |
5835edda | 1293 | type, thread); |
bad40917 | 1294 | |
b0a7d1a0 | 1295 | if (map == NULL) |
b91fc39f | 1296 | goto out_problem_map; |
b0a7d1a0 ACM |
1297 | |
1298 | thread__insert_map(thread, map); | |
b91fc39f | 1299 | thread__put(thread); |
b0a7d1a0 ACM |
1300 | return 0; |
1301 | ||
b91fc39f ACM |
1302 | out_problem_map: |
1303 | thread__put(thread); | |
b0a7d1a0 ACM |
1304 | out_problem: |
1305 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1306 | return 0; | |
1307 | } | |
1308 | ||
b91fc39f | 1309 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1310 | { |
f3b623b8 | 1311 | if (machine->last_match == th) |
0ceb8f6e | 1312 | machine->last_match = NULL; |
f3b623b8 | 1313 | |
59a51c1d | 1314 | BUG_ON(atomic_read(&th->refcnt) == 0); |
b91fc39f ACM |
1315 | if (lock) |
1316 | pthread_rwlock_wrlock(&machine->threads_lock); | |
0170b14f | 1317 | rb_erase_init(&th->rb_node, &machine->threads); |
b91fc39f | 1318 | RB_CLEAR_NODE(&th->rb_node); |
236a3bbd | 1319 | /* |
f3b623b8 ACM |
1320 | * Move it first to the dead_threads list, then drop the reference, |
1321 | * if this is the last reference, then the thread__delete destructor | |
1322 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1323 | */ |
1324 | list_add_tail(&th->node, &machine->dead_threads); | |
b91fc39f ACM |
1325 | if (lock) |
1326 | pthread_rwlock_unlock(&machine->threads_lock); | |
f3b623b8 | 1327 | thread__put(th); |
236a3bbd DA |
1328 | } |
1329 | ||
b91fc39f ACM |
1330 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1331 | { | |
1332 | return __machine__remove_thread(machine, th, true); | |
1333 | } | |
1334 | ||
162f0bef FW |
1335 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1336 | struct perf_sample *sample) | |
b0a7d1a0 | 1337 | { |
d75e6097 JO |
1338 | struct thread *thread = machine__find_thread(machine, |
1339 | event->fork.pid, | |
1340 | event->fork.tid); | |
314add6b AH |
1341 | struct thread *parent = machine__findnew_thread(machine, |
1342 | event->fork.ppid, | |
1343 | event->fork.ptid); | |
b91fc39f | 1344 | int err = 0; |
b0a7d1a0 | 1345 | |
236a3bbd | 1346 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1347 | if (thread != NULL) { |
236a3bbd | 1348 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1349 | thread__put(thread); |
1350 | } | |
236a3bbd | 1351 | |
314add6b AH |
1352 | thread = machine__findnew_thread(machine, event->fork.pid, |
1353 | event->fork.tid); | |
b0a7d1a0 ACM |
1354 | if (dump_trace) |
1355 | perf_event__fprintf_task(event, stdout); | |
1356 | ||
1357 | if (thread == NULL || parent == NULL || | |
162f0bef | 1358 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 | 1359 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1360 | err = -1; |
b0a7d1a0 | 1361 | } |
b91fc39f ACM |
1362 | thread__put(thread); |
1363 | thread__put(parent); | |
b0a7d1a0 | 1364 | |
b91fc39f | 1365 | return err; |
b0a7d1a0 ACM |
1366 | } |
1367 | ||
162f0bef FW |
1368 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1369 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1370 | { |
d75e6097 JO |
1371 | struct thread *thread = machine__find_thread(machine, |
1372 | event->fork.pid, | |
1373 | event->fork.tid); | |
b0a7d1a0 ACM |
1374 | |
1375 | if (dump_trace) | |
1376 | perf_event__fprintf_task(event, stdout); | |
1377 | ||
b91fc39f | 1378 | if (thread != NULL) { |
236a3bbd | 1379 | thread__exited(thread); |
b91fc39f ACM |
1380 | thread__put(thread); |
1381 | } | |
b0a7d1a0 ACM |
1382 | |
1383 | return 0; | |
1384 | } | |
1385 | ||
162f0bef FW |
1386 | int machine__process_event(struct machine *machine, union perf_event *event, |
1387 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1388 | { |
1389 | int ret; | |
1390 | ||
1391 | switch (event->header.type) { | |
1392 | case PERF_RECORD_COMM: | |
162f0bef | 1393 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1394 | case PERF_RECORD_MMAP: |
162f0bef | 1395 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1396 | case PERF_RECORD_MMAP2: |
162f0bef | 1397 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1398 | case PERF_RECORD_FORK: |
162f0bef | 1399 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1400 | case PERF_RECORD_EXIT: |
162f0bef | 1401 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1402 | case PERF_RECORD_LOST: |
162f0bef | 1403 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1404 | case PERF_RECORD_AUX: |
1405 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 AH |
1406 | case PERF_RECORD_ITRACE_START: |
1407 | ret = machine__process_itrace_start_event(machine, event); | |
1408 | break; | |
b0a7d1a0 ACM |
1409 | default: |
1410 | ret = -1; | |
1411 | break; | |
1412 | } | |
1413 | ||
1414 | return ret; | |
1415 | } | |
3f067dca | 1416 | |
b21484f1 | 1417 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1418 | { |
b21484f1 | 1419 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1420 | return 1; |
3f067dca ACM |
1421 | return 0; |
1422 | } | |
1423 | ||
bb871a9c | 1424 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1425 | struct addr_map_symbol *ams, |
1426 | u64 ip) | |
1427 | { | |
1428 | struct addr_location al; | |
3f067dca ACM |
1429 | |
1430 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1431 | /* |
1432 | * We cannot use the header.misc hint to determine whether a | |
1433 | * branch stack address is user, kernel, guest, hypervisor. | |
1434 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1435 | * Thus, we have to try consecutively until we find a match | |
1436 | * or else, the symbol is unknown | |
1437 | */ | |
bb871a9c | 1438 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1439 | |
3f067dca ACM |
1440 | ams->addr = ip; |
1441 | ams->al_addr = al.addr; | |
1442 | ams->sym = al.sym; | |
1443 | ams->map = al.map; | |
1444 | } | |
1445 | ||
bb871a9c | 1446 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1447 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1448 | { | |
1449 | struct addr_location al; | |
1450 | ||
1451 | memset(&al, 0, sizeof(al)); | |
1452 | ||
bb871a9c | 1453 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1454 | if (al.map == NULL) { |
1455 | /* | |
1456 | * some shared data regions have execute bit set which puts | |
1457 | * their mapping in the MAP__FUNCTION type array. | |
1458 | * Check there as a fallback option before dropping the sample. | |
1459 | */ | |
bb871a9c | 1460 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1461 | } |
1462 | ||
98a3b32c SE |
1463 | ams->addr = addr; |
1464 | ams->al_addr = al.addr; | |
1465 | ams->sym = al.sym; | |
1466 | ams->map = al.map; | |
1467 | } | |
1468 | ||
e80faac0 ACM |
1469 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1470 | struct addr_location *al) | |
98a3b32c SE |
1471 | { |
1472 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1473 | ||
1474 | if (!mi) | |
1475 | return NULL; | |
1476 | ||
bb871a9c ACM |
1477 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1478 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1479 | mi->data_src.val = sample->data_src; |
1480 | ||
1481 | return mi; | |
1482 | } | |
1483 | ||
37592b8a AK |
1484 | static int add_callchain_ip(struct thread *thread, |
1485 | struct symbol **parent, | |
1486 | struct addr_location *root_al, | |
73dbcd65 | 1487 | u8 *cpumode, |
37592b8a AK |
1488 | u64 ip) |
1489 | { | |
1490 | struct addr_location al; | |
1491 | ||
1492 | al.filtered = 0; | |
1493 | al.sym = NULL; | |
73dbcd65 | 1494 | if (!cpumode) { |
8b7bad58 AK |
1495 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1496 | ip, &al); | |
73dbcd65 | 1497 | } else { |
2e77784b KL |
1498 | if (ip >= PERF_CONTEXT_MAX) { |
1499 | switch (ip) { | |
1500 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1501 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1502 | break; |
1503 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1504 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1505 | break; |
1506 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1507 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1508 | break; |
1509 | default: | |
1510 | pr_debug("invalid callchain context: " | |
1511 | "%"PRId64"\n", (s64) ip); | |
1512 | /* | |
1513 | * It seems the callchain is corrupted. | |
1514 | * Discard all. | |
1515 | */ | |
1516 | callchain_cursor_reset(&callchain_cursor); | |
1517 | return 1; | |
1518 | } | |
1519 | return 0; | |
1520 | } | |
73dbcd65 DH |
1521 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1522 | ip, &al); | |
2e77784b KL |
1523 | } |
1524 | ||
37592b8a AK |
1525 | if (al.sym != NULL) { |
1526 | if (sort__has_parent && !*parent && | |
1527 | symbol__match_regex(al.sym, &parent_regex)) | |
1528 | *parent = al.sym; | |
1529 | else if (have_ignore_callees && root_al && | |
1530 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1531 | /* Treat this symbol as the root, | |
1532 | forgetting its callees. */ | |
1533 | *root_al = al; | |
1534 | callchain_cursor_reset(&callchain_cursor); | |
1535 | } | |
1536 | } | |
1537 | ||
5550171b | 1538 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1539 | } |
1540 | ||
644f2df2 ACM |
1541 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1542 | struct addr_location *al) | |
3f067dca | 1543 | { |
3f067dca | 1544 | unsigned int i; |
644f2df2 ACM |
1545 | const struct branch_stack *bs = sample->branch_stack; |
1546 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1547 | |
3f067dca ACM |
1548 | if (!bi) |
1549 | return NULL; | |
1550 | ||
1551 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1552 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1553 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1554 | bi[i].flags = bs->entries[i].flags; |
1555 | } | |
1556 | return bi; | |
1557 | } | |
1558 | ||
8b7bad58 AK |
1559 | #define CHASHSZ 127 |
1560 | #define CHASHBITS 7 | |
1561 | #define NO_ENTRY 0xff | |
1562 | ||
1563 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1564 | ||
1565 | /* Remove loops. */ | |
1566 | static int remove_loops(struct branch_entry *l, int nr) | |
1567 | { | |
1568 | int i, j, off; | |
1569 | unsigned char chash[CHASHSZ]; | |
1570 | ||
1571 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1572 | ||
1573 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1574 | ||
1575 | for (i = 0; i < nr; i++) { | |
1576 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1577 | ||
1578 | /* no collision handling for now */ | |
1579 | if (chash[h] == NO_ENTRY) { | |
1580 | chash[h] = i; | |
1581 | } else if (l[chash[h]].from == l[i].from) { | |
1582 | bool is_loop = true; | |
1583 | /* check if it is a real loop */ | |
1584 | off = 0; | |
1585 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1586 | if (l[j].from != l[i + off].from) { | |
1587 | is_loop = false; | |
1588 | break; | |
1589 | } | |
1590 | if (is_loop) { | |
1591 | memmove(l + i, l + i + off, | |
1592 | (nr - (i + off)) * sizeof(*l)); | |
1593 | nr -= off; | |
1594 | } | |
1595 | } | |
1596 | } | |
1597 | return nr; | |
1598 | } | |
1599 | ||
384b6055 KL |
1600 | /* |
1601 | * Recolve LBR callstack chain sample | |
1602 | * Return: | |
1603 | * 1 on success get LBR callchain information | |
1604 | * 0 no available LBR callchain information, should try fp | |
1605 | * negative error code on other errors. | |
1606 | */ | |
1607 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1608 | struct perf_sample *sample, | |
1609 | struct symbol **parent, | |
1610 | struct addr_location *root_al, | |
1611 | int max_stack) | |
3f067dca | 1612 | { |
384b6055 KL |
1613 | struct ip_callchain *chain = sample->callchain; |
1614 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1615 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1616 | int i, j, err; |
1617 | u64 ip; | |
1618 | ||
1619 | for (i = 0; i < chain_nr; i++) { | |
1620 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1621 | break; | |
1622 | } | |
1623 | ||
1624 | /* LBR only affects the user callchain */ | |
1625 | if (i != chain_nr) { | |
1626 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1627 | int lbr_nr = lbr_stack->nr; | |
1628 | /* | |
1629 | * LBR callstack can only get user call chain. | |
1630 | * The mix_chain_nr is kernel call chain | |
1631 | * number plus LBR user call chain number. | |
1632 | * i is kernel call chain number, | |
1633 | * 1 is PERF_CONTEXT_USER, | |
1634 | * lbr_nr + 1 is the user call chain number. | |
1635 | * For details, please refer to the comments | |
1636 | * in callchain__printf | |
1637 | */ | |
1638 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1639 | ||
1640 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1641 | pr_warning("corrupted callchain. skipping...\n"); | |
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | for (j = 0; j < mix_chain_nr; j++) { | |
1646 | if (callchain_param.order == ORDER_CALLEE) { | |
1647 | if (j < i + 1) | |
1648 | ip = chain->ips[j]; | |
1649 | else if (j > i + 1) | |
1650 | ip = lbr_stack->entries[j - i - 2].from; | |
1651 | else | |
1652 | ip = lbr_stack->entries[0].to; | |
1653 | } else { | |
1654 | if (j < lbr_nr) | |
1655 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1656 | else if (j > lbr_nr) | |
1657 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1658 | else | |
1659 | ip = lbr_stack->entries[0].to; | |
1660 | } | |
1661 | ||
73dbcd65 | 1662 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1663 | if (err) |
1664 | return (err < 0) ? err : 0; | |
1665 | } | |
1666 | return 1; | |
1667 | } | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1673 | struct perf_evsel *evsel, | |
1674 | struct perf_sample *sample, | |
1675 | struct symbol **parent, | |
1676 | struct addr_location *root_al, | |
1677 | int max_stack) | |
1678 | { | |
1679 | struct branch_stack *branch = sample->branch_stack; | |
1680 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1681 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1682 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1683 | int i, j, err; |
8b7bad58 AK |
1684 | int skip_idx = -1; |
1685 | int first_call = 0; | |
1686 | ||
384b6055 KL |
1687 | callchain_cursor_reset(&callchain_cursor); |
1688 | ||
1689 | if (has_branch_callstack(evsel)) { | |
1690 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1691 | root_al, max_stack); | |
1692 | if (err) | |
1693 | return (err < 0) ? err : 0; | |
1694 | } | |
1695 | ||
8b7bad58 AK |
1696 | /* |
1697 | * Based on DWARF debug information, some architectures skip | |
1698 | * a callchain entry saved by the kernel. | |
1699 | */ | |
1700 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1701 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1702 | |
8b7bad58 AK |
1703 | /* |
1704 | * Add branches to call stack for easier browsing. This gives | |
1705 | * more context for a sample than just the callers. | |
1706 | * | |
1707 | * This uses individual histograms of paths compared to the | |
1708 | * aggregated histograms the normal LBR mode uses. | |
1709 | * | |
1710 | * Limitations for now: | |
1711 | * - No extra filters | |
1712 | * - No annotations (should annotate somehow) | |
1713 | */ | |
1714 | ||
1715 | if (branch && callchain_param.branch_callstack) { | |
1716 | int nr = min(max_stack, (int)branch->nr); | |
1717 | struct branch_entry be[nr]; | |
1718 | ||
1719 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1720 | pr_warning("corrupted branch chain. skipping...\n"); | |
1721 | goto check_calls; | |
1722 | } | |
1723 | ||
1724 | for (i = 0; i < nr; i++) { | |
1725 | if (callchain_param.order == ORDER_CALLEE) { | |
1726 | be[i] = branch->entries[i]; | |
1727 | /* | |
1728 | * Check for overlap into the callchain. | |
1729 | * The return address is one off compared to | |
1730 | * the branch entry. To adjust for this | |
1731 | * assume the calling instruction is not longer | |
1732 | * than 8 bytes. | |
1733 | */ | |
1734 | if (i == skip_idx || | |
1735 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1736 | first_call++; | |
1737 | else if (be[i].from < chain->ips[first_call] && | |
1738 | be[i].from >= chain->ips[first_call] - 8) | |
1739 | first_call++; | |
1740 | } else | |
1741 | be[i] = branch->entries[branch->nr - i - 1]; | |
1742 | } | |
1743 | ||
1744 | nr = remove_loops(be, nr); | |
1745 | ||
1746 | for (i = 0; i < nr; i++) { | |
1747 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1748 | NULL, be[i].to); |
8b7bad58 AK |
1749 | if (!err) |
1750 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1751 | NULL, be[i].from); |
8b7bad58 AK |
1752 | if (err == -EINVAL) |
1753 | break; | |
1754 | if (err) | |
1755 | return err; | |
1756 | } | |
1757 | chain_nr -= nr; | |
1758 | } | |
1759 | ||
1760 | check_calls: | |
3f067dca ACM |
1761 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
1762 | pr_warning("corrupted callchain. skipping...\n"); | |
1763 | return 0; | |
1764 | } | |
1765 | ||
8b7bad58 | 1766 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1767 | u64 ip; |
3f067dca ACM |
1768 | |
1769 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1770 | j = i; |
3f067dca | 1771 | else |
a60335ba SB |
1772 | j = chain->nr - i - 1; |
1773 | ||
1774 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1775 | if (j == skip_idx) | |
1776 | continue; | |
1777 | #endif | |
1778 | ip = chain->ips[j]; | |
3f067dca | 1779 | |
73dbcd65 | 1780 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1781 | |
3f067dca | 1782 | if (err) |
2e77784b | 1783 | return (err < 0) ? err : 0; |
3f067dca ACM |
1784 | } |
1785 | ||
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1790 | { | |
1791 | struct callchain_cursor *cursor = arg; | |
1792 | return callchain_cursor_append(cursor, entry->ip, | |
1793 | entry->map, entry->sym); | |
1794 | } | |
1795 | ||
cc8b7c2b ACM |
1796 | int thread__resolve_callchain(struct thread *thread, |
1797 | struct perf_evsel *evsel, | |
1798 | struct perf_sample *sample, | |
1799 | struct symbol **parent, | |
1800 | struct addr_location *root_al, | |
1801 | int max_stack) | |
3f067dca | 1802 | { |
384b6055 KL |
1803 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1804 | sample, parent, | |
1805 | root_al, max_stack); | |
3f067dca ACM |
1806 | if (ret) |
1807 | return ret; | |
1808 | ||
1809 | /* Can we do dwarf post unwind? */ | |
1810 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1811 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1812 | return 0; | |
1813 | ||
1814 | /* Bail out if nothing was captured. */ | |
1815 | if ((!sample->user_regs.regs) || | |
1816 | (!sample->user_stack.size)) | |
1817 | return 0; | |
1818 | ||
dd8c17a5 | 1819 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1820 | thread, sample, max_stack); |
3f067dca ACM |
1821 | |
1822 | } | |
35feee19 DA |
1823 | |
1824 | int machine__for_each_thread(struct machine *machine, | |
1825 | int (*fn)(struct thread *thread, void *p), | |
1826 | void *priv) | |
1827 | { | |
1828 | struct rb_node *nd; | |
1829 | struct thread *thread; | |
1830 | int rc = 0; | |
1831 | ||
1832 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1833 | thread = rb_entry(nd, struct thread, rb_node); | |
1834 | rc = fn(thread, priv); | |
1835 | if (rc != 0) | |
1836 | return rc; | |
1837 | } | |
1838 | ||
1839 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1840 | rc = fn(thread, priv); | |
1841 | if (rc != 0) | |
1842 | return rc; | |
1843 | } | |
1844 | return rc; | |
1845 | } | |
58d925dc | 1846 | |
a33fbd56 | 1847 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1848 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1849 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1850 | { |
602ad878 | 1851 | if (target__has_task(target)) |
58d925dc | 1852 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1853 | else if (target__has_cpu(target)) |
58d925dc ACM |
1854 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1855 | /* command specified */ | |
1856 | return 0; | |
1857 | } | |
b9d266ba AH |
1858 | |
1859 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1860 | { | |
1861 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1862 | return -1; | |
1863 | ||
1864 | return machine->current_tid[cpu]; | |
1865 | } | |
1866 | ||
1867 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1868 | pid_t tid) | |
1869 | { | |
1870 | struct thread *thread; | |
1871 | ||
1872 | if (cpu < 0) | |
1873 | return -EINVAL; | |
1874 | ||
1875 | if (!machine->current_tid) { | |
1876 | int i; | |
1877 | ||
1878 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1879 | if (!machine->current_tid) | |
1880 | return -ENOMEM; | |
1881 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1882 | machine->current_tid[i] = -1; | |
1883 | } | |
1884 | ||
1885 | if (cpu >= MAX_NR_CPUS) { | |
1886 | pr_err("Requested CPU %d too large. ", cpu); | |
1887 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1888 | return -EINVAL; | |
1889 | } | |
1890 | ||
1891 | machine->current_tid[cpu] = tid; | |
1892 | ||
1893 | thread = machine__findnew_thread(machine, pid, tid); | |
1894 | if (!thread) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | thread->cpu = cpu; | |
b91fc39f | 1898 | thread__put(thread); |
b9d266ba AH |
1899 | |
1900 | return 0; | |
1901 | } | |
fbe2af45 AH |
1902 | |
1903 | int machine__get_kernel_start(struct machine *machine) | |
1904 | { | |
1905 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1906 | int err = 0; | |
1907 | ||
1908 | /* | |
1909 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1910 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1911 | * all addresses including kernel addresses are less than 2^32. In | |
1912 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1913 | * addresses will be assumed to be in user space - see | |
1914 | * machine__kernel_ip(). | |
1915 | */ | |
1916 | machine->kernel_start = 1ULL << 63; | |
1917 | if (map) { | |
1918 | err = map__load(map, machine->symbol_filter); | |
1919 | if (map->start) | |
1920 | machine->kernel_start = map->start; | |
1921 | } | |
1922 | return err; | |
1923 | } |